WO2020213279A1 - Stator et moteur - Google Patents

Stator et moteur Download PDF

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Publication number
WO2020213279A1
WO2020213279A1 PCT/JP2020/009152 JP2020009152W WO2020213279A1 WO 2020213279 A1 WO2020213279 A1 WO 2020213279A1 JP 2020009152 W JP2020009152 W JP 2020009152W WO 2020213279 A1 WO2020213279 A1 WO 2020213279A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
yoke
core
stator core
split
Prior art date
Application number
PCT/JP2020/009152
Other languages
English (en)
Japanese (ja)
Inventor
高山　佳典
基史 大辻
興治 井上
翔吾 岡部
Original Assignee
ダイキン工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Priority to US17/603,866 priority Critical patent/US12034335B2/en
Priority to CN202080017916.1A priority patent/CN113491052B/zh
Priority to EP20791083.7A priority patent/EP3937349B1/fr
Priority to ES20791083T priority patent/ES2953924T3/es
Publication of WO2020213279A1 publication Critical patent/WO2020213279A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/17—Stator cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • This disclosure relates to stators and motors.
  • stator there is an inner rotor type stator having an annular stator core formed by connecting a plurality of divided cores at a joint surface (see, for example, Japanese Patent Application Laid-Open No. 2002-95192 (Patent Document 1)).
  • Each of the plurality of divided cores of the stator has a yoke portion extending in the circumferential direction and a teeth portion extending radially inward from the yoke portion.
  • a convex portion is provided on one side of the yoke portion of the split core in the circumferential direction and a concave portion is provided on the other side in the circumferential direction.
  • a plurality of divided cores are assembled in an annular shape by fitting them into the recesses.
  • the above stator has a problem that the outer peripheral end of the joint portion of the split cores must be welded in the stacking direction in order to secure the force for fastening the split cores to each other.
  • the present disclosure proposes a stator capable of securing a fastening force between the split cores without welding the split cores, and a motor including the stator.
  • the stator of the present disclosure has a stator core with a plurality of split cores arranged in an annular shape.
  • the split core has a yoke portion and a teeth portion that protrudes from the yoke portion in the radial direction of the stator core.
  • a fitting portion is provided along the axial direction of the stator core from the upper end surface to the lower end surface of the stator core on the joint surface side where the yoke portions of the divided cores adjacent to each other are connected to each other. It is characterized in that the fitting portion is provided with caulking.
  • a fitting portion is provided along the axial direction of the stator core from the upper end surface to the lower end surface of the stator core on the joint surface side where the yoke portions of the divided cores adjacent to each other are connected to each other, and the fitting portion is provided.
  • the fitting portion is plastically deformed, so that the fastening force between the split cores can be improved even if the fitting portion has dimensional variations in processing. Therefore, the fastening force between the divided cores can be secured without welding the divided cores to each other.
  • the fastening force between the split cores can be secured, so that the length of the contact portion in the fitting portion can be shortened to reduce the leakage flux, and the efficiency of the motor provided with this stator can be reduced. Can be improved.
  • the caulking portion is provided on the fitting portion on at least one of the upper end surface and the lower end surface of the stator core.
  • the fastening force between the split cores can be easily improved by providing the fitting portion with caulking on at least one of the upper end surface and the lower end surface of the stator core. Further, since the strain due to caulking stays at at least one of the upper end side and the lower end side of the stator core, the influence of iron loss due to the caulking strain is small.
  • the caulking is provided so as to straddle the divided cores adjacent to each other.
  • the caulking is provided on the divided cores adjacent to each other so as to straddle the stator core in the radial direction.
  • the split cores adjacent to each other are plastically deformed in the radial direction to the portions constituting the fitting portions of the respective split cores. Therefore, the fastening force between the split cores can be further improved.
  • the fitting portion has a convex portion of the yoke portion provided on one side of the stator core in the circumferential direction and a concave portion of the yoke portion provided on the other side of the circumferential direction.
  • Each of the convex portion and the concave portion has two linear portions parallel to each other extending from one end on the joint surface side and an arc portion connecting between the other ends of the two straight portions.
  • divisions adjacent to each other by convex portions and concave portions having two straight portions parallel to each other extending from one end on the joint surface side and an arc portion connecting between the other ends of the two straight portions.
  • the cores can be easily connected to each other.
  • the motor of the present disclosure is with any one of the above stators It is characterized by including a rotor arranged so as to face each other in the radial direction of the stator.
  • the leakage flux of the stator can be reduced and the efficiency can be improved.
  • a stator having a stator core capable of ensuring a fastening force between the split cores without welding the split cores to each other.
  • FIG. 1 is a cross-sectional view of the motor 100 provided with the stator 1 of the first embodiment of the present disclosure, and shows a cross-sectional view of the motor 100 as seen from the line II of FIG. Further, FIG. 2 is a cross-sectional view of the motor 100 as viewed from the line II-II of FIG.
  • this motor 100 is a so-called outer rotor type motor 100, and includes an annular stator 1 and a rotor 2 arranged so as to face the radial outer side of the stator 1.
  • the motor 100 rotationally drives a member such as a fan (not shown) via a shaft 3.
  • the rotor 2 includes a mold resin 20, a plurality of back yokes 21, and a plurality of magnets 22.
  • the mold resin 20 is formed in a cup shape and covers the stator core 10 of the stator 1.
  • the mold resin 20 is fixed to the shaft 3 via the connecting member 23.
  • BMC Bulk Molding Compound
  • the back yoke 21 and the magnet 22 are integrally molded with the mold resin 20.
  • eight back yokes 21 are arranged in a ring shape.
  • Eight magnets 22 are arranged in an annular shape inside the back yoke 21 in the radial direction.
  • the magnets 22, 22 adjacent to each other in the circumferential direction have different magnetisms.
  • the stator 1 includes a stator core 10, an insulator 11, and a coil 12.
  • the stator core 10 is composed of a plurality of laminated electromagnetic steel plates.
  • the stator core 10 has an annular stator yoke 30 and a plurality of tooth portions 31 projecting radially outward from the outer peripheral surface of the stator yoke 30.
  • twelve tooth portions 31 are arranged at intervals in the circumferential direction.
  • the insulator 11 is attached to each tooth portion 31 of the stator core 10.
  • the insulator 11 is made of an insulating material such as resin.
  • the coil 12 is wound around the teeth portion 31 of the stator core 10 in a concentrated manner via an insulator 11. An electric current is passed through the coil 12 to generate an electromagnetic force in the stator core 10, and the electromagnetic force causes the rotor 2 to rotate together with the shaft 3.
  • the mold resin portion 13 integrally molds the stator core 10, the insulator 11, and the coil 12.
  • the mold resin portion 13 is composed of, for example, a BMC (Bulk Molding Compound).
  • the mold resin portion 13 supports the shaft 3 via the bearing 14.
  • the mold resin portion 13 is provided with a mounting base 15 for mounting the motor 100 to another member (not shown).
  • a cover 16 is attached to the mounting base 15.
  • the cover 16 covers the rotor 2 to prevent dust, water, and the like from entering.
  • the cover 16 is formed by integrally molding the bearing housing 17 with a molding resin.
  • the cover 16 supports the shaft 3 via a bearing 18.
  • FIG. 3 is a plan view of the stator core 10. As shown in FIG. 3, the stator core 10 has a plurality of divided cores 40 arranged in an annular shape.
  • the split core 40 has a yoke portion 41 on the inner side in the radial direction and a teeth portion 31 protruding radially outward from the yoke portion 41.
  • Twelve split cores 40 are arranged in a ring shape, and the yoke portions 41 of the adjacent split cores 40 are connected to each other to form the stator core 10.
  • FIG. 4 is a plan view of the split core 40 constituting the stator core 10.
  • the yoke portion 41 of the split core 40 is located on one of the joint surfaces 43 in the circumferential direction of the stator core 40.
  • a convex portion 41a provided along the axial direction of the stator core 10 from the upper end surface to the lower end surface of the above, and the stator core 10 from the upper end surface to the lower end surface of the split core 40 on the other joint surface 43 side in the circumferential direction. It has a recess 41b provided along the axial direction of the above.
  • the convex portion 41a of the yoke portion 41 is an arc connecting two straight portions L11 and L12 parallel to each other extending from one end on the joint surface 43 side and the other ends of the two straight portions L11 and L12. It has a part C11.
  • the arc portion C11 is provided so that the tip end side (the side opposite to the joint surface 43) of the convex portion 41a bulges.
  • the straight portions L11 and L12 each form an angle of 90 deg with respect to the joint surface 43 on one side in the circumferential direction of the yoke portion 41.
  • the recess 41b of the yoke portion 41 is formed by two linear portions L21 and L22 extending from one end on the joint surface 43 side and parallel to each other, and an arc portion C21 connecting the other ends of the two straight portions L21 and L22.
  • the arc portion C21 is provided so that the side of the recess 41b opposite to the joint surface 43 bulges.
  • the straight portions L21 and L22 each form an angle of 90 deg with respect to the joint surface 43 on the other side in the circumferential direction of the yoke portion 41.
  • the caulking 47 is provided on the yoke portion 41 side of the split core 40, and the caulking 48 is provided on the radial outer side of the teeth portion 31.
  • the caulking 47, 48 a plurality of electromagnetic steel plates constituting the split core 40 are integrally fixed.
  • FIG. 5 is a plan view showing a state in which two divided cores 40 are connected, and in FIG. 5, L1 is a center line in the radial direction of each divided core 40.
  • L1 is a center line in the radial direction of each divided core 40.
  • the convex portion 41a of the yoke portion 41 of one split core 40 and the concave portion 41b of the yoke portion 41 of the other split core 40 are fitted.
  • Adjacent yoke portions 41 are joined to each other.
  • the fitting portion 42 is composed of the convex portion 41a and the concave portion 41b of the yoke portion 41.
  • the fitting portion 42 includes a convex portion 41a of the yoke portion 41 of one split core 40 and a peripheral portion of the concave portion 41b forming the recess 41b in the yoke portion 41 of the other split core 40.
  • the end of the fitting portion 42 is located inside in the radial direction.
  • the virtual circle VC is a circle centered on the center O1 of the stator core 10 and passes through the center P1 of the joint surface 43 of the yoke portion 41 of each divided core 40.
  • the plane along the joint surface 43 of the yoke portion 41 passes through the center O1 of the stator core 10.
  • the outer peripheral portions of the adjacent teeth portions 31, 31 are separated from each other.
  • the adjacent yoke portions 41 are connected to each other, and the stator yoke 30 is formed by the 12 connected yoke portions 41.
  • each split core 40 Before connecting the adjacent yoke portions 41 to each other, each split core 40 covers the teeth portion 31 with an insulator 11 (shown in FIGS. 1 and 2) and coiles the teeth portion 31 covered with the insulator 11. Wind 12 (shown in FIG. 1).
  • the fitting portion 42 provided in the yoke portion 41 of the split core 40 extends in a direction orthogonal to the joint surface 43.
  • one of the caulking 44A to 44G is provided on the fitting portion 42 on the upper end surface and the lower end surface of the stator core 10.
  • the fitting portion 42 is plastically deformed, so that the fastening force between the split cores 40 can be improved.
  • the fastening force between the split cores 40 can be secured by the caulking 44A to 44G, so that the length of the contact portion in the fitting portion 42 is shortened to reduce the leakage flux. can do.
  • the strain caused by the caulking 44A to 44G stays on the upper end side and the lower end side of the stator core 10, the influence of the iron loss due to the strain of the caulking 44A to 44G is small.
  • FIG. 6 shows an enlarged view of a main part including the fitting portion 42 of the split core 40 of the first example, and as shown in FIG. 6, a length is formed on the convex portion 41a of the fitting portion 42 of the yoke portion 41.
  • a thick linear caulking 44A is provided so that the direction is along the circumferential direction of the stator core 10.
  • FIG. 7 shows an enlarged view of a main part including the fitting portion 42 of the split core 40 of the second example, and as shown in FIG. 7, a circle is formed on the convex portion 41a of the fitting portion 42 of the yoke portion 41.
  • a caulking 44B having a shape is provided.
  • FIG. 8 shows an enlarged view of a main part including the fitting portion 42 of the split core 40 of the third example, and as shown in FIG. 8, with the tip portion of the convex portion 41a of one of the adjacent yoke portions 41.
  • a thick linear caulking 44C is provided so as to straddle the other adjacent yoke portion 41 so that the longitudinal direction is along the circumferential direction of the stator core 10.
  • FIG. 9 shows an enlarged view of a main part including the fitting portion 42 of the split core 40 of the fourth example, and as shown in FIG. 9, the convex portion 41a of one of the adjacent yoke portions 41 and the convex portion 41a thereof.
  • a thick linear caulking 44D is provided so as to straddle both sides of the portion 41a in the radial direction and the other adjacent yoke portion 41 so that the longitudinal direction is along the radial direction.
  • FIG. 10 shows an enlarged view of a main part including the fitting part of the split core 40 of the fifth example, and as shown in FIG. 10, the convex portion 41a of one of the adjacent yoke portions 41 has a longitudinal direction.
  • a thick linear caulking 44E is provided along the radial direction.
  • FIG. 11 shows an enlarged view of a main part including the fitting portion 42 of the split core 40 of the sixth example, and as shown in FIG. 11, on both sides of the concave portion 41b of one of the adjacent yoke portions 41 in the radial direction.
  • Thick linear caulking 44F, 44G is provided so that the longitudinal direction is along the circumferential direction of the stator core 10.
  • FIG. 12 shows the magnetic flux distribution of the stator core 10 obtained by simulation. Note that, in FIG. 12, the rotor 2 has a configuration for simulation, unlike the configuration shown in FIG.
  • the magnetic flux density in the fitting portion 42 of the split core 40 is lower than the magnetic flux density in the region radially outside the fitting portion 42 in the joint surface 43 of the split core 40. Therefore, the leakage flux due to the fitting portion 42 can be reduced.
  • the fitting portion 42 is provided on the joint surface 43 in which the yoke portions 41 of the split cores 40 adjacent to each other are connected to each other, and the fitting portions 42 are provided with caulking 44A to 44G. Since the fitting portion 42 is plastically deformed, the fastening force between the split cores 40 can be improved even if the fitting portion 42 has dimensional variations in processing. Therefore, the fastening force between the divided cores 40 can be secured without welding the divided cores 40 to each other.
  • the fastening force between the split cores 40 can be secured, so that the length of the contact portion in the fitting portion 42 can be shortened to reduce the leakage flux, and the efficiency of the motor 100 can be reduced. Can be improved.
  • the fastening force between the split cores 40 can be easily improved by providing the caulking portions 42A to 44G on the upper end surface and the lower end surface of the stator core 10.
  • the fitting portions 42 of the split cores 40 adjacent to each other are formed. Since it is plastically deformed in the radial direction, the fastening force between the split cores 40 can be further improved.
  • the convex portion 41a of the fitting portion 42 is an arc portion that connects two straight portions L11 and L12 that are parallel to each other extending from one end on the joint surface 43 side and the other ends of the two straight portions L11 and L12.
  • the recess 41b of the fitting portion 42 has a shape having C11, and the recess 41b of the fitting portion 42 is formed between two parallel straight portions L21 and L22 extending from one end on the joint surface 43 side and the other ends of the two straight portions L21 and L22.
  • the convex portion 41a of one of the split cores 40 adjacent to each other is inserted into the concave portion 41b of the other split core 40 from the circumferential direction of the stator core 10.
  • the split cores 40 can be easily connected to each other.
  • the leakage flux of the stator 1 can be reduced and the efficiency can be improved.
  • a virtual circle VC in which the convex portion 41a and the concave portion 41b of the fitting portion 42 are centered on the center O1 of the stator core 10 and pass through the center P1 of the joint surface 43 of the yoke portion 41.
  • the fitting portion is provided on the joint surface regardless of the position of the yoke portion on the joint surface.
  • the convex portion 41a of the fitting portion 42 has two linear portions L11 and L12 parallel to each other extending from one end on the joint surface 43 side, and the two straight portions L11 and L12.
  • the shape has an arc portion C11 connecting the ends
  • the recess 41b of the fitting portion 42 has two straight portions L21 and L22 parallel to each other extending from one end on the joint surface 43 side and the two straight portions L21.
  • the shape has an arc portion C21 connecting the other ends of L22, but the shape of the convex portion and the concave portion of the fitting portion 42 is not limited to this.
  • one of the two straight portions parallel to each other of the convex portion and the concave portion of the fitting portion may be a curved portion, both may be curved portions instead of the two straight portions, and the arc portion may be replaced. It may be a polygonal part.
  • FIG. 13 is a plan view of the split core 140 constituting the stator core of the stator of the second embodiment of the present disclosure.
  • the split core 140 of the stator of the second embodiment has the same configuration as the split core 40 of the stator 1 of the first embodiment except for the fitting portion 142 composed of the convex portion 141a and the concave portion 141b of the yoke portion 141. Therefore, Fig. 1 and Fig. 2 are used.
  • the yoke portion 141 of the split core 140 has a convex portion 141a provided on one side in the circumferential direction of the stator core 10 and a concave portion 141b provided on the other side in the circumferential direction.
  • the convex portion 141a of the yoke portion 141 is an arc connecting two straight portions L31 and L32 parallel to each other extending from one end on the joint surface 143 side and the other ends of the two straight portions L31 and L32. It has a part C31.
  • the arc portion C31 is provided so that the tip end side (the side opposite to the joint surface 143) of the convex portion 141a bulges.
  • the straight portion L31 forms an angle of 85 deg with respect to the joint surface 143 on one side in the circumferential direction of the yoke portion 141. Further, the straight portion L32 forms an angle of 95 deg with respect to the joint surface 143 on one side in the circumferential direction of the yoke portion 141.
  • the recess 141b of the yoke portion 141 includes two straight portions L41 and L42 that are parallel to each other extending from one end on the joint surface 143 side and an arc portion C41 that connects the other ends of the two straight portions L41 and L42.
  • the arc portion C41 is provided so that the side of the recess 141b opposite to the joint surface 143 bulges.
  • the straight portion L41 forms an angle of 95 deg with respect to the joint surface 143 on the other side of the yoke portion 141 in the circumferential direction. Further, the straight portion L42 forms an angle of 85 deg with respect to the joint surface 143 on one side in the circumferential direction of the yoke portion 141.
  • a caulking 147 is provided on the yoke portion 141 side of the split core 140, and a caulking 148 is provided on the radial outer side of the tooth portion 131.
  • a plurality of electromagnetic steel plates constituting the divided core 40 are integrally fixed by the caulking 147,148.
  • the stator of the second embodiment has the same effect as the stator 1 of the first embodiment.
  • the fitting portion 142 provided in the yoke portion 141 of the split core 140 extends diagonally outward with respect to the direction orthogonal to the joint surface 143. As a result, the fitting portion 142 is less likely to be disengaged from the force acting on the split core 140 in the direction orthogonal to the joint surface 143, so that the coupling force between the split cores 140 can be maintained.
  • the outer rotor type stator 1 and the motor 100 including the stator 1 have been described, but the present invention may be applied to the inner rotor type stator and the motor including the stator 1.
  • the yoke portions 41,141 of the divided cores 40, 140 arranged in an annular shape are connected by the fitting portions 42, 142, but the shapes of the fitting portions are not limited to this, and they are not limited to each other.
  • Any fitting structure may be used, which is provided along the axial direction of the stator core from the upper end surface to the lower end surface of the stator core on the joint surface side where the yoke portions of the adjacent split cores are connected to each other.
  • the end of the fitting portion is located radially inside the joint surface of the yoke portion of the split core with respect to the center between the radially outer end and the radial inner end of the stator core.
  • a part of the fitting portion on the side opposite to the joint surface is a virtual circle centered on the center of the stator core and is the center between the radial outer end and the radial inner end of the joint surface. It may be located radially outside the virtual circle passing through.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

Un stator est pourvu d'un noyau de stator ayant une pluralité de noyaux fendus (40) agencés selon une forme annulaire. Chaque noyau fendu (40) a une section de fourche (41) sur un côté radialement interne, et une section de dents (31) faisant saillie radialement vers l'extérieur à partir de la section de fourche (41). Au niveau d'un côté surface de jonction (43) au niveau duquel sont reliées les sections de fourche (41) de noyaux fendus (40) mutuellement adjacents, une section d'ajustement (42) est disposée le long d'une direction axiale du noyau de stator à partir d'une surface d'extrémité supérieure du noyau de stator jusqu'à une surface d'extrémité inférieure, et une pièce de fixation (44C) est disposée dans la section d'ajustement (42).
PCT/JP2020/009152 2019-04-17 2020-03-04 Stator et moteur WO2020213279A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US17/603,866 US12034335B2 (en) 2019-04-17 2020-03-04 Stator and motor
CN202080017916.1A CN113491052B (zh) 2019-04-17 2020-03-04 定子和马达
EP20791083.7A EP3937349B1 (fr) 2019-04-17 2020-03-04 Stator et moteur
ES20791083T ES2953924T3 (es) 2019-04-17 2020-03-04 Estator y motor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019078434A JP7211883B2 (ja) 2019-04-17 2019-04-17 ステータおよびモータ
JP2019-078434 2019-04-17

Publications (1)

Publication Number Publication Date
WO2020213279A1 true WO2020213279A1 (fr) 2020-10-22

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PCT/JP2020/009152 WO2020213279A1 (fr) 2019-04-17 2020-03-04 Stator et moteur

Country Status (6)

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US (1) US12034335B2 (fr)
EP (1) EP3937349B1 (fr)
JP (1) JP7211883B2 (fr)
CN (1) CN113491052B (fr)
ES (1) ES2953924T3 (fr)
WO (1) WO2020213279A1 (fr)

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CN113491052B (zh) 2024-03-08
ES2953924T3 (es) 2023-11-17
US20220216742A1 (en) 2022-07-07
CN113491052A (zh) 2021-10-08
JP7211883B2 (ja) 2023-01-24
EP3937349A1 (fr) 2022-01-12
JP2020178431A (ja) 2020-10-29
US12034335B2 (en) 2024-07-09
EP3937349A4 (fr) 2022-04-27

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